Skip to Content
Find More Like This
Return to Search

Rotating diffuser for pressure recovery in a steam cooling circuit of a gas turbine

United States Patent

January 1, 2002
View the Complete Patent at the US Patent & Trademark Office
The buckets of a gas turbine are steam-cooled via a bore tube assembly having concentric supply and spent cooling steam return passages rotating with the rotor. A diffuser is provided in the return passage to reduce the pressure drop. In a combined cycle system, the spent return cooling steam with reduced pressure drop is combined with reheat steam from a heat recovery steam generator for flow to the intermediate pressure turbine. The exhaust steam from the high pressure turbine of the combined cycle unit supplies cooling steam to the supply conduit of the gas turbine.
Eldrid; Sacheverel Q. (Saratoga Springs, NY), Salamah; Samir A. (Niskayuna, NY), DeStefano; Thomas Daniel (Ballston Lake, NY)
General Electric Company (Schenectady, NY)
09/ 726,214
November 28, 2000
The Government of the United States of America has rights in this invention pursuant to COOPERATIVE AGREEMENT NO. DE-FC21-95MC31176 awarded by the U.S. Department of Energy.